differential count

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differential count

Diff, white blood cell differential count Hematology The relative number of leukocytes–eg segmented and band forms of granulocytes, eosinophils, lymphocytes and monocytes in the peripheral circulation, expressed in percentages of the total WBC count. See White cell count.


a numerical computation or indication.

differential count
a count, on a stained blood smear, of the proportion of different types of leukocytes (or other cells), previously expressed in percentages but now usually reported in absolute numbers (109/l) for a better indication of abnormalities that may exist.
milk cell count
platelet count
the count of the total number of platelets per liter (109/l) of blood by counting the platelets in a counting chamber, a hematology analyzer, or by estimating the number on a stained blood smear.
sperm count
see semen concentration.
total bacterial count
determination of the total number of bacteria in the sample examined microscopically, then a calculation of the number per ml. These do not distinguish between viable and non-viable organisms. See also breed's direct smear method.
viable bacterial cell count
enumerating the number of viable bacteria present in a sample based on counting the number of colonies from a given dilution.
wool count
an arbitrary number given to wool to indicate its fiber diameter, e.g. 60's, based on an eyeball assessment of the number of hanks of yarn that could be spun from one pound of wool. Now superseded by measurement of the diameter, e.g. 20 microns.
worm count
a total worm count requires a freshly slaughtered cadaver, collection of intestinal or other fluid in an aliquot sample; in the case of lungs it is necessary to digest the tissue; counting actual worms and by multiplication measuring the total worm burden.
References in periodicals archive ?
We did not fully assess the effect of interfering substances on the CBC and automated differential count.
As a class project at the University of Hawaii (with consent of participants), we tracked changes in microscopic leukocyte differential counts and cellular morphology in an EDTA sample that was kept at room temperature.
Reference leukocyte (WBC) differential count (proportional) and evaluation of instrumental methods: Approved standard H20-A2 (2nd ed.
A combination of cell size, myeloperoxidase staining and nuclear lobulation was used to perform the total leucocyte and 6-part differential count.
Abstract: The avian hemogram is usually performed in veterinary diagnostic laboratories by using manual cell counting techniques and differential counts determined by light microscopy.
A general trend of having lower than normal hematocrit, RBC count and lymphocytes and higher than normal segmenters was observed; eosinophil was also seen to be absent in most of the differential counts.
Dipel[R]PM proved to be effective at reducing the total number of hemocytes in the larvae of both resistant and susceptible populations, while Xentari[R]WDG affects only the differential count of these cells.
The averages were compared by the Tukey test, at 5% probability and the percentage from the differential count of the blood and exudate cells were transformed in arc sin ([square root of (P+05)]).
To determine blood biochemical parameters and differential count of white blood cells, one hen per replicate was bled via wing vein on day 40 of trial.
hemoglobin, hematocrit, cell counts, and automated differential counts), this module constructs truth tables and lists false-negative and false-positive results when comparisons are performed with the manual white cell differential count as a reference method.
The model uses seven measures from the CBC: hematocrit, red-cell distribution width, mean corpuscular-hemoglobin concentration, mean corpuscular volume, platelet count, white cell count, and white-cell differential count.

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